Cash-register.



W. A. CHRYST.

CASH REGISTER. APPLICATION FILED JUNE 7,1913.

Patented June 26, 1912. '7

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CASH REGISTER.

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CASH REGISTER.

APPLICATION FILED JUNE 1. 191a.

Patented June 26, 1917.

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W. A- CHRYST.

CASH REGISTER.

APPLICATION FILED JUNE 7. I913.

'Patnted June 26, 1917.

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CASH REGISTER.

APPLICATION FILED JUNE 7. 191.3.

Patented June 26, 1917.

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CASH REGISTER.

APPLICATION FILED JUNE 7. I913.

Patented June 26, 1917.

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CASH REGISTER.

APPLICATION FILED JUNE 7. .1913.

1,230,864. Patented June 26, 1917.

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CASH REGISTER. APPLICATION FILED JUNE 7. 1913.

1,230,864. Patented June 26, 1917.

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CASH REGISTER.

APPLICATION FILED JUNE 7. I913- Patented June 26, 1917.

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UNITED streams PATENT orurou.

WILLIAM A. CHRYST, OF DAYTON, OHIO, ASSIGNOR TO THE NATIONAL CASH REGISTEBi COMPANY, OF DAYTON, OHIO, A CORPORATION OF OHIO, (INCORPORATED IN 1906.)

CASH-REGISTER.

Specification of Letters Patent.

Patented June 26, 1917.

Application filed June 7, 1913. Serial No. 772,276.

State of Ohio, have invented certain new and useful Improvements in Cash-Registers, of which I declare the following to be a full, clear, and eXact description.

This invention relates to cash registers and in particular to the class of registers known as multiple totalizer registers and more particularly relates to those known as depart ment registers, wherein it is desirable mechanically to totalize entries according to their class, and also to accumulate the grand total, and to print entries and totals on a record strip or sales slips.

The objects of the invention are to provide improved constructions for operating accounting devices, effecting carrying operations, alining totalizers, and the printing of totals and subtotals. The improvements include actuators for the accounting devices which are movable dilit'erentially and carry a plurality of racks, part at least, of each rack being movable relative to the supporting part of the actuator, thus providing means for operating totalizing devices simultaneously but effecting in them independent transfer operations. The relative movement between parts of the actuators is also employed to permit overthrow of the main part of the actuators due to their elasticity and inertia, while the parts which are in engagement with the accounting devices may remain stationary. Improvements in carrying mechanism are provided in that relative movement between an actuating rack and its differentially movable support is positively effected while normally the rack and its support are locked together positively. The totalizer supporting frames carrv alining devices which serve to aline and lock the totalizer pinions when the totalizers are out of engagement and when they are being shifted with respect to their actuators, but are so constructed that an engaging movement of the totalizers serves to effect unlocking movement of the alining devices.

It is also a feature of the invention so to mount the actuators with respect to their driving elements that in an operation of the machine all the actuators and the parts they drive will not be started in their movement simultaneously but successively and with corresponding successive completion of their movements thus to eliminate otherwise sudden substantlal increases and decreases of load upon the operating mechanism at vari ous times in the operation of the machine, and effect a much smoother operation of the machine as a whole. This arrangement of the actuators also is of utility in properly providing for transfers in this particular positive transfer mechanism in which transfers should be successive from between lower to between higher totalizer pinions.

In combination with differential mechanism driven by invariable movable members through latch connections, the invention ineludes totalizer controlled latch operating mechanism to control the dilferential mechanism on total printing operations.

Improved devices are provided for effecting two continuous operations of the machine on total and subtotal printing op- 'erations as in printing totals 0r sub-totals it is necessary to give the machine a preliminary operation for the purpose ofvselecting a totalizer and to restore mechanism displaced during a preceding entry.

With these and incidental objects in view, the invention consists in certain novel features of construction and combinations of parts, the essential elements of which are set forth in appended claims, and a preferred form of embodiment of which is hereinafter described with reference to the drawings which accompany and form part of the .specificati on.

Of said drawings:

Figure 1 is a front view of the machine.

Fig. 2 is a right side elevationwith the casing omitted of a machine constructed according to the invention.

banks of value keys.

Fig. 7 is another transverse vertical section viewed from the opposite direction and showing various details of construction not included in Fig. 6.

Fig. 7 a is an'illustrative view showing the special arrangement of the cams for driving the actuators successively.

Fig. 8 is a view in left side elevation of one bank of value keys showing in section the supporting shafts.

Fig. 9 shows a vertical section taken on the line 9-9 of Fig. 8.

Fig. 10 is a detail section taken on the lin 10-10 of Fig. 9.

Fig. 11 is a detail in right side elevation of one section of the differential mechanism and its supporting frames.

Fig. 12 is a transverse vertical section taken at the right of the bank of department keys and looking to the left.

Fig. 13 comprises two detail views of a spiralv cam employed to select for operation the department totalizers.

Fig. 14 is a rear view of the totalizer in which grand totals are accumulated.

Fig. 15 is a section taken on the line aa, Fig. 14;, looking in the direction of the arrow.

Fig. 16 is a bottom plan of department totalizers.

Fig. 17 is a sectional view on the line 5-1), Fig. 16, looking in the direction of the arrow.

Fig. 18 is a detail in right side elevation of controlling mechanism employed mainly in total. printing operations.

Fig. 19 shows in right side elevation keys and related mechanism employed in taking impressions of totals.

Fig. 20 is a plan view of the mechanism shown in Fig. 19.

Fig. 21 is a detail similar to Fig. 19 but showing mechanism as it would appear with the department total key depressed.

Fig. 22 is a detail of mechanism for operating slides shown in Fig. 21.

Fig. 23 is a view in left side elevation just within the end casing showing the printing mechanism at the left of the machine.

Fig. 24: is a detail of type setting mechanism.

The machine includes various mechanisms, namely. a driving mechanism, keyboard, differential mechanism. one grand totalizer' and a plurality of department totalizers, printing mechanism here shown for printing items on a detail strip but which may be employed equally as well for printing on inserted slips, and. finally. devices employed in the printing of totals.

The driving mechanism comprises mainly two main drive shafts with gear connections whereby these shafts may be caused to make one rotation by two rotations of a crank. The single rotation of the drive shafts is all that is required when items are added in the machine, but the driving mechanism may be controlled by total keys so that the drive shafts make two complete rotations before the machine is finally stopped and locked in its Zero position: This is for the purpose of causing the driving mechanism to restore all mechanism to its home position before a total printing operation occurs, and to select the proper department totalizer in time for it to be operated properly in total taking ope 'ations.

The keyboard comprises a plurality of banks of amount keys, one bank of department keys and two total keys, one of which is used for the printing of totals and subtotals from the main or grand totalizer and the other is employed for the printing of totals and sub-totals from the department totalizers.

The differential mechanism comprises a plurality of differentially movable segments on which are mounted two sets of racks, one for operating the grand totalizing device and the other for operating the department totalizers. Each segment of the differential mechanism carries a latch by which it is normally connected to oscillating members having a constant movement and connected to the driving mechanism. The latches are constructed to disengage the segments from the oscillating members when carried into engagement with the shanks of depressed keys. In this manner differential movement is imparted positively to the ditferential segments, the racks or actuators which are mounted on these segments being in position to cooperate with totalizer pinions which are engaged therewith on the forward or return strokes of the actuators. The a tuating racks are each made in two parts and one part may be moved relatively to the other so that transfers may be effected or not as desired and this relative movement in the present case is not accomplished through the action of springs but is positively e'tfected. A. stated above the actuating racks are de signed to start and complete their movements successively to eliminate sudden jars in the operation of the machine.

Two frames are provided for supporting the totalizing devices. One of the frames supports the main or grand totalizing device and the other frame supports a plurality of department totalizers. The department totalizer frame is shiftable transversely of the plane of the actua tors so tha ii any totalizing device may be brought into operative relation therewith. and both supporting frames are shiftable toward and away from the actuators for the purpose of engaging and disengageing the totalizers. The engagin movement of the totalizers occurs through connections to the driving mechanism which connections operate in a regular way except when totals are printed. The transverse shifting of the department totalizer carrying frame is accon'iplished through connections to the driving mechanism which I printed.

connections are controlled by the bank of department keys.

' The printing mechanism comprises a plu rality of type carriers operatively connected with the differential mechanism so as to be set differentially according to the movement of the differential mechanism whether controlled by the keyboard when items are entered or by the totalizers when totals are An ink ribbon, paper strip and platen, all operating in well. known manners, are as usual included.

Driving mechanism.

Referring to the drawings, Figs. 2 and 3 show how rotation may be in'iparted to the main drive shafts 6 and 11. A manually operative crank 1 (shown partly broken away) is journaled on a stub shaft 2 and is fast to a pinion 3 meshing with a large gear 4 also iournaled on a stub shaft and meshing with gear 5 fast to drive shaft 6. The drive shaft 6 (Fig. 3) also carries a gear 7 connected through intermediate pinions S and 9 to a gear 10 fast to drive shaft 11. By means of this gearing two clockwise rotations of crank 1 serve to cause a single rotation of shafts (3 and 11 in the directions indicated by the arrows in Fig. 3.

It is, of course, to be understood that any other means or source of power may be employed without departing from the spirit of the present invention. The crank means shown is only for the purpose of illustration.

To drive the differential mechanism, shaft 6 is provided with a plurality of pairs of cams 12 and 18 (Figs. 7 and 7 each pair of which cooperates with rollers 14: and 15 journaled on pins in Y-shaped bell crank levers 16 of which there is one for each bank of keys and which are journaled on stub pins 17 one of which is carried by the frame for each differential unit as will be hereinafter made clear. The bell. crank levers 16 at their upper ends are connected by pivots 19 to links 18, the latter at their forward ends being pivoted by pins 20 to segments 21 loose on individual sleeves 299 connecting supporting frames 200 and 201 (Figs. 4. 6, 7, 11, and 12) for the differential segments to be describedfarther on. Segments 21 are by this mechanism oscillated invariable extents on operations of the machine and serve to drive differential mechanism under the control of the value keys and also differential mechanism under the con trol ofa bank of departmentkeys. The differential. mechanism as a whole has connections for selecting department totalizers for operation and for driving these totalizers and the main totalizer differentially and also for setting type carriers in the printing mechanism.

The pairs of cams 12 and 13 are arranged spirally on the shaft 6. That is the units cams are set slightly ahead of the tens cams, the tens cams slightly ahead of the hundreds cams and so on along the shaft. In Fig. 7 this arrangement of the cams is shown, but is purposely exaggerated a little to make the idea clear. In actual practice one pair of cams isset approximately degrees ahead. of the pair of camsof next highest order. One purpose of this arrangement of the cams is to make possible a positive transfer from one totalizer wheel to the wheel of next higher order. This positive transfer mechanism will be fully described later. Another purpose of this arrangement of the cams is to make the machine easier in its operation. Each pair of cams drives a division of the machine and by staggering the cams no two. of the pairs of cams will start or stop their sections of the mechanism simultaneously and the functions of each section will be performed in corresponding relation to the functions being performed by the other sections. This has the effect of distributing the movement of the mechanism along the stroke of the operating handle, lessening the resistance to the movement of the handle that is found in similar devices where the sections operated are started and stopped at the same instant and perform simultaneously their functions such as adding and setting the type carriers. So far as the transfer from one totalizer wheel to another is concerned, the units actuator cams need not necessarily be placed ahead of the tens actuator cams, but such is preferable to promote smoother operation of the mechanism, it being obvious that by arranging the pairs of cams spirally on the driving shaft the differential members will be picked up singly and released singly thereby elimi nating the .jar which would be present in this machine and is in fact present in other machines where the condition prevails that all of the registering segments are picked up simultaneously.

Figs. 4 and 5 show connections whereby the driving mechanism imparts power to devices for engaging the totalizers with their actuating racks. For this purpose drive shaft 6 carries a pair of cams 24 and 25 (Fig. which operate on rollers 26 and 27 carried by a bell crank lever 28 fast to shaft 29. Also fast to shaft 29 is a bell crank lever 30 the downwardly extending arm of which is provided with a slot into which extends a roller 49 on a bell crank lever 47 pivoted on stud 48. Thus oscillation of hell crank lever 30 effects an opposite oscillation of hell crank lever 47. The lever 30 has a roller 31 at the forward end of its horizontal arm. while the bell crank lever 47 has a correspondingly located roller 46. The roller 31 projects into a pair of slots 32 each formed in oneof apa-ir of plates 83 in lateral alinement. Each of the plates 33 is forn'i'ed with a foot or projection 178 at its lower end for a purpose hereinafter described, and each plate is pivoted independently by a pin to its appropriate one of a pair of links 35. Each of the links 35 is pivoted at 36 to one of a pair of arms 37 pivoted on a stud 38 extending from the right hand side frame of the machine. At their upper extremities the links 35 are pivoted at 40 to two levers ll and a2 loosely journaled on a stud lfialso extending from the right hand, side frame. The right hand or forward link 35 in Fig. t is connected in the above manner to the lever (ll and the right hand or forward plate 33 in Fig. 4. The left hand link 35, concealed by being behind the one shown in Fin. 4, is connected to the lever and the left hand plate 33 concealed in Fig. t. The location of the left and right hand parts above mentioned are clearly indicated in Fig. 2-0. it will be understood that each of the levers 4-1 and i2 is in the above manner ini'lependently connected to one of the pair of plates 33. The levers 4'1 and. 42 have slots 44 for engaging rollers 321 on arms 320 311C 351 fast to totalizer engaging shafts 305 and 336 (l iggs. H to 17) w the particular arrangement of which will be pointed out farther on, it now being; intended 'merely to show how power is transmitted to the totalizer engaging mechanism. From the above construction. it will be seen that oscillation of hell crank lever 30 normally will. cause, at a definite time in the operation of the machine determined by the contour of cams F25 and 24: (Fig. 5), a reciprocation of both of the plates 33, and consequently levers 4:1 and 42 will be rocked. thereby rocking the shafts and 336, and in this manner cause the engagement of the totalizers with their actuating mechanism as required for performing additions in the totalizers.

The object of bell crank lever 47 is to operate the totalizer engaging mechanism when totals or subtotals are printed while the lever 30 directly operates this mechanism in item entering operations. Total keys are provided by which the plates 33 may be disengaged from bell crank lever 30 and positioned for engagementwith bell crank lever 4-7 but these keys and their connecting mech anism will be described farther on. Springs 51 normally hold the plates 33 in engagement with roller 31 on the bell crank lever 30. To the pivot 3 which supports each plate 33 is also pivoted a pawl like member -15 normally held out of operative relation with roller 46 on bell crank lever -17, as shown in Fig.4, by a spring 52. The total keys have connections for rocking the plates 33 and pawls against the action of these springs and accordingly reversing" the connections with bell crank levers 30 and. 47 for the purpose of chi. s ing the time of engagement of the totalizers with their actuating racks.

The driving mechanism of the machine normally locked by a pawl 53 (Fig. 3) fast to a shaft 54: and held in a notch 55 formed in a disk 56. The disk 56 is fast to drive shaft 11 and, consequently, operation of the driving mechanism is normally prevented. A spring (if) (Fig. 2) coiled upon shaft 54- and liiearing between a pin 70 on a machine frame and a pin 71 on an arm 72 fast to shaft 5 L normally urges the shaft to rock in a counter-clockwise direction and thereby oisengage pawl 53 from notch but a pawl 57 also fast on shaft of has a lateral extend in flan 'e normally resting on a shoulder 58 of plate 59 pivoted by a pin 60 to the machine frame (Figs. 2 and 1.8). Thus in order to release the machine it is necessary to rock plate 59 counter-clockwise around pivot 60 in order to permit downward roeking of pawl 57. thus permitting spring 69 to withdraw pawl from notch To so rock plate 59 the bank of department keys to be described fart-her on. controls means for permitting operation of a spring" (31 extended l'ietween plate 59 and a bell crank lever (32 fast to a shaft (33. The bell crank ever (32 pivotally connected by a pin 64: to a link 5 pivoted near its lower end. by a pin (36 to a lever 67 pivoted by a pin 63 to plate A roller 73 carried by a pitman 74;. is normally in hoist-ion to be engaged by a forward curved ee'de 7 5 of lever 67. By this mechanism when a rocking movement of shaft 63 is permitted in a manner hereinafter described by the depression of a department key spring 61 rocks the bell crank lever 62 in a clockwise direction causing the pin 64 to move downwardly slightly, thus pushingdownward on link 65 and through lever 67 iausine' plate 59 to rock in a counter-clockwise directioi'n rocking movement of lever 67 being at this time prevented by roller 73. In this manner pawl 57, shaft 54:, and locking pawl are permitted to rock counter-cloclnvise and release the machine.

At an end of the operation of the machine pawl is caused to reen gagre the notch in disk 56 by a roller 76, on disk 77 fast to drive shaft 11, engaging" arm 72 fast to shaft 5-1t. thus I'OClIlDQ' the shaft as required in a clockwise direction. lVhile roller 76 is in engagement with arm 72 one of a pair of rollers 78 on near t engages the forward end 79 (Fig. 18) of plate 59 thus rocking the plate to normal position with its shoulder 53 beneath pawl 57. The return movement of plate as. through the link 65 pushing upward on bell crank lever 62, restores shaft 3 to normal position which permits release of the depressed depai'tment key as described later.

@n total printing operations the driving mechanism of the machine is permitted to go through two ordinary operations and in order to make the machine stopping mechanism ineffective at the end of the first opera tion of the driving mechanism, pitman 7'l is moved forwardly carrying the roller 73 out of engagement with the curved surface of the lever 67, as shown on Figs. 2 and 18. The parts ,will then be in the position shown in Fig. 18. Then the first engagement between one of the rollers 78 and the forward end of plate 59 is not effective to restore shaft 63 as pin 73 is not in position to engage the face 75 of lever 67 and thereby compel the toggle connection between plate 59 and arm 62 on shaft 63 to move upward as a rigid unit. For this reason the shaft 63 is not returned to normal position and the plate 59 is returned to its releasing position as shown in Fig. 18, as the member 67 is free to rock clockwise around the pivot 68 when the member 59 moves clockwise. At the completion of the second operation of the driving mechanism the pitman is in normal position and the roller 73 is in position to perform its function of preventing a rocking movementof the member 67 and thereby controls the restoring of a rod 139 (Fig. 12) to beneath a shoulder 138 on a detent 134 hereinafter described. The shaft 63 is thus held in such an angular position that plate 59 can not rock clockwise around its pivot 60.

The drawings show the machine as it would appear provided with a manually operative crank for the purpose of being so driven, but it is also intended that the ma chine be provided with an electric motor and clutch to connect the motor with the driving mechanism. hen a motor is employed it is desired to open the motor circuit and disconnect the clutch from the driving mechansim slightly before the driving mechanism of the machine reaches its home position. In such case in order to insure complete operation of the driving mechanism, that is, not relying entirely upon its momentum, drive shaft 6 is provided. with a cam (Fig. 2) which, at the end of operations, is engaged at a surface 81 by a roller 82 carried on an arm 83 pivoted on a stub shaft 841- and urged upwardly by a spring 85 extended between arm 83 and a pin on one of the machine frames.

Keg board.

Operations of the machine are controlled by a keyboard comprising a plurality of banks of value keys 100 (Figs. 1, 7 and 8) and a single bank of department keys 101 (Figs. 1 and 12). The purpose of the value keys, as usual, is to control the operation of differential mechanism in order that the totalizer elements may be rotated differentially and type carriers set when items are entered. The object of the bankof department keys is to control differential mechanism for selecting department totalizers for operation and setting a corresponding type carrier in printing mechanism.

The construction of a bank of value keys is shown in Figs. 8 to 10 inclusive. All of the elements required in a bank of value keys are mounted in unit comprising a supporting frame 102. These frames are all supported by cross rods 103 and 104. Each key is provided with a pin 105 which eX- tends across the upper end ofa corresponding spring 106' and between corresponding arms 107 and 108 respectively on plates 109 and 110. Thus when a key is depressed it causes the compression of its spring 106 and consequently the spring serves to restore the key to normal position when the latter is finally released. By means of the plates 109 and 1.10 all of the springs may be assembled on these plates previous to the final assembling of the machine. To place springs on the plates the same are brought together in pairs with the arms 107 and 108 opposite each other. The springs are then slipped over the arms and the plates moved relati'vely to each other so that shoulders 111 are brought over the upper edges of the springs, thereby retaining the latter in place. Screws 112 are then passed through holes in the plates thereby retaining the plates in such relative position that the springs are retained in position. The screws 112 also serve for fastening plates 109 and 110 to key frames 102.

The keys cotiperate with the key detents 113 and locking plates 11 1 which are respec tively supported by arms 115 and 116, 117 and 118 pivoted by pins 119 to the key frames 102. The detent 113 temporarily retains keys in depressed position and oper-- ates a Zero stop for the difierential mechanism, and for this purpose is provided with a plurality of pins 120 for coiiperating with shoulders 121 on the keys. When a key is depressed theinclined edge of shoulder 121 engages a pin 120 thus forcing the detent downwardly swinging arms 115 and 116 around pins 119. Extending across the forward edge of arm 116 is a pin 123 on a zero stop pawl 12 1 pivoted by a pin 125 to a plate 129 secured rigidly to the frame 102. The pawl 124 has a forwardly extending tail 127 which is connected by a spring 128 to a pin on the key frame. Thus the spring normally holds the zero pawl in the position shown in Fig. 8 and through the pin 123 holds detent plate 113 in its upper position as shown. hen a key is depressed, downward movement of detent 113 occurs until shoulder 121. on the key has passed the pin when the detent rises, slightly under the action of spring 128, retaining the key in its depressed position. ment of the detent by arm 116 engaging pin The downward move- 123 serves to rock zero stop 124 forwardly and it is retained in its forward position as long as the key is depressed, the slight upward movement of the detent when pin 120 passes in front of shoulder 121 on the key not being suflicient to permit the return of the stop 124 into operative relation with the differential mechanism, to be described farther on.

The locking plate 114 is provided with ex tensions 130 to pass over the pin 105 on a depressed key and to pass beneath pins 105 on undepressed keys thereby preventing manipulation of all of the keys during operation of the machine. In order to give the locking plates 114 the required upward movement, the supporting arm 117 for each locking plate is provided with an extension 131 extending over the rod 130 carried by arms 140 fast to the shaft 63. This shaft is rocked in a counter-clockwise direction (Fig. on depression of a department key and therefore auses rod 130 to engage the extension 131. and lift the locking plate 1l4.

The department keys 101 (Fig. 12) are also slidably mounted in a key frame 102 and are depressible against the action of springs in the manner of the amount keys. Cooperating with pins 132 on the department keys is the detent plate 134 provided with curved cam slots 133 into the appropriate one of which the pin 132 on the depressed key enters to raise the detent plate. The detent 134 is pivoted on arms and 136 by pins 137 and the said arms are pivotally hung from pins 119 (Figs. 8 and 12). The upper end of detent 134 is provided with the curved extension 138 normally resting on the rod 139 carried by the arms 140 on shaft 63. Also in operative relation with rod 139 is a pawl 141 pivoted to the detent 184 by a pin 142. hen a department key is depressed the detent 134 is cammed upwardly by engagement of the pin 132 on the key with a curved slot 133 and the upward movement of the detent causes shoulder 138 to pass out of engagement with the rod 139 and the latter to engage pawl 141, rocking it out of its path. The rod 139 is then free to rock upwardly in the 'notch formed in the detent by extension or shoulder 138 and a clockwise rocking of shaft 63 occurs as urged by spring 61. (Fig. Thus the depression of a department key permits operation of the machine releasing mechanism as previously described.

The total key 152 (Fig. 21) for controlling the printing of totals and subtotals from the main totalizer, and to be described farther on, has connections for engaging and lift ing detent 134 (Fig. 12) at a slot 144 formed in the lower end of the detent 1.34 in order that it may cause the detent to release the machine when it is desired to print a total or subtotal from the main totalizer, at which time it is desired to prevent the (:lepartment keys from being depressed so that the department totalizer selecting mechanism will not be operable. A Zero stop lever 146 pivotally mounted on the frame for the bank of department keys by a pin 147 carries a pin 145 for engaging the detent 134 at the slot 144. A downward extension 148 of the Zero stop 146 has a pin 149 in position to be engaged by an arm 150 on a shaft 151. On the depression of the main total key this shaft is rocked, thus causing arm 150 to engage pin 149 causing the zero stop to lift detent 134 and also to move into the path of the differential mechanism for this bank, which will be described farther on.

The total keys 152 and 1553 (Figs. 1, 4, 1.), 20 and 21) are slidably mounted on a stud 154 projecting from the machine frame and a rod extending across the machine. The key 152 is employed when it is desired to print a total or subtotal from the main totalizer and consequently it has connections for rocking shaft 151 so that the machine may be released by causing an upward movement of detent 134 (Fig. 12). For this purpose the shank of key 152 has a notch 156 (Fig. 18) into which extends an arm 157 fast to the shaft 151.

Both. total keys 152 and 153 have eonnertions for making the machine locking mechanism inoperative until the driving mechanism has gone through two ordinary operations in order that the first operation may be employed to position to normal any mechanism which may have been left in moved position on a preceding entry of an. item. The

latching mechanism for both keys which serves to retain the keys in depressed position is operative to release the depressed total key at the end of the first rotation of the drive shafts. lVhen this occurs a subtotal is printed leaving the operated totalizei' in its original position. If it is desired to print a total and reset the totalizer to zero the depressed key is manually retained in depressed position during the two operations of the driving mechanism, thus making the total key releasing mechanism ineffective until these two operations have been completed. Following this plan both keys have connections for reversing the operation of the totalizer engaging mechanism previously described and shown in Fig. 4 so that the totalizers will not be engaged with their actuators until the first rotation of the drive shafts is practically completed. The totalizers are held in engagement a length of time depending upon whether it is desired to print a total or a subtotal.

The shank of each key (Figs. 4. 10 20 and 21) has a laterally extending flange 158 extending across the rear edges of both plates 33 and the pawls 45 pivoted thereon,

the one on the main totalizer key being shown extending over the one on the department totalizer key. Consequently when a total key is depressed both the two plates and the two pawls 45 will be rocked counterclockwise around their pivots 3& against the action of springs 51 and 52 (Fig. 41) to an intermediate or neutral position. This rocking movement of plates 33 to intermediate position disengages them from the roller 31 on bell crank lever and brings their lower ends to the position .shown in Fig. 21 in which the projections 178 on the lower ends of the plates are not in the path of the roller 46 on the lever 47 but the rearwardly projecting fingers on the pawls 45 are in the path of the roller d6. Mounted between the keys 152 and 153 are a pair of duplicate selector slides 159 and 160 on which pawls 162 are pivotally mounted by pins 161 for co'ciperating with a stud 163 projecting from either side of an arm 16 1 fast on an oscillating shaft 165. Springs 166 connected to the pawls by links 1661 normally urge pawls 162 to rock clockwise into operative relation with the stud 163, but the pawls are normally prevented from such movement and held in the position shown in Fig. 19 by pins 167 on pawls 16S pivoted on shaft 165 and also having pins 169 normally resting on shoulders 170 of the keys 152 and 153. The pins 167 cooperate with shoulders 171 on pawls 162 and springs 172 cause a disengage ment of pawls 168 with pawls 162 when the 1 corresponding key 152 or 153 is depressed far enough to permit pin 169 to rock down wardly clear of shoulder 170.

Oscillation of shaft 165 is effected by a cam 173 (Fig. fast to crive shaft 6 and cotiperating with a pitman 174: which is supported by the drive shaft at its rear end and at its forward end is pivoted to an arm 175 fast to shaft Cam 173 is so-placed on shaft 6 that while bell crank levers and d7 on total printing operations, are being idly rocked to carry their rollers 31 and 46 toward each other the forward rocking of arm 16st will. take place. This forward movement is sufficient to carry the stud 163 sufficiently forward to pass in front of a recess 1647 in the forward end of the pawl 162. hen the stud 163 moves forwardly out of engagement with the lower edge of the pawl 162 the spring 166 rocks the pawl counter-clockwise and. this movement of the pawl is arrested by engagement of theforwardly and upwardly extending linger on the forward end of the pawl with the stud. Then upon the return of the arm 16% which occurs between the 270th and 320th degrees of movement of the drive shafts the stud 163 will engage with the recess 1647 of the operated pawl 162 and through this pawl carry the corresponding slide 159 or 160 rearwardly so that just before the 320th demanner the plate is rocked still farther counter-clockwise so that its shoulder 178 is brought beneath roller e6 on bell crank lever 47 which at such time is at rest in its moved position. Then whether the depressed total key is released or not the selected plate will be lowered by engagement of the roller 46 with the shoulder 178 on the return move ment of hell. crank levers 36 and 17 which takes place during the last degrees of lirst rotation of the drive shafts as in either event cam 173 will retain the slide 159 or 160 in its rear position during such time. In this manner the selected totalizer is engaged with the actuating mechanism near the end of the first rotation of the driving mechanism. As the selector slide for the depressed total key is moved rearwardly a pin 196 on arm 1967 of the slide engages an arm 192 of the pawl 168 and forces the latter clockwise about its pivot 165 to disengage its pin 169 from in front of projection 170 of the depressed total. key and release the latter and allow it to be restored by a key spring 1521 to undepressed position. WVhen the depr ssed key is restored to normal position the pawls 15 are released and allowed to be moved forwardly by their springs as the rear edges 176 of the slides are not in alinement with the pawls and do not serve to hold them rearwardly after the key has been released. The slides 159 and 160 are between the total keys and the plates are between the pawls and each of the slides has a flange 199 the one on the slide for the main totalizer key when they are in normal position being over the one on the slide for the department totalizer key and when either slide is in rearmost position to hold its plate 33 in its extreme rcarmost position,

its flange 199 engages the other plate 33 and retains this other plate in the neutral position in which the plates 33 are shown in Fig. 21 and in which it will not engage with the rollers 31 or &6 after the depressed key has been released. It can be seen that if the plate 33 for the unoperated total key were not held in neutral position it would rock to its normal position when the roller 31 is moved to its normal position near the beginning of the second. operation of the ma chine and therefore effect engagement of an extra totalizer. The flanges 199 on the slides are not of sufiicient length however to engage the pawls which are left free in their forward position when the depressed key returns forwardly. The selected totalizer is engaged with the actuators in a total or sult -total taking operation at the same time that the totalizer is disengaged from the actuators during an item entering opera- 

